@chunkyfrog @emenite Thanks, folks. Yes, I agree that measurement beats estimation, until measurement costs more than I'd likely save (in this case). These back of the napkin calculations come to about $5 a month at my local energy rates. But you're right, this is probably high since it peaks for th...

I'm trying to calculate how much of my energy bill is due to my resmed. It's plugged in all the time. Is there a formula folks use?